Search results

  1. Alwin

    Swap behaviour on Hw ssd raid

    Swap is always used. I hope the article below can bring some insight. https://chrisdown.name/2018/01/02/in-defence-of-swap.html
  2. Alwin

    VM auf ceph storage

    Das ist eher nach dem Motto, wenn du deine Daten liebst, dann ist unsafe falsch. :)
  3. Alwin

    Ceph member without OSDs?

    Exactly. If you don't limit the storage to certain nodes, it will always try to mount/map it on every node in the cluster.
  4. Alwin

    Ceph member without OSDs?

    No, please look at the link. Just create a RBD storage.
  5. Alwin

    Ceph member without OSDs?

    Then it's simply a storage. https://pve.proxmox.com/pve-docs/chapter-pvesm.html#ceph_rados_block_devices
  6. Alwin

    VM auf ceph storage

    Naja, nicht ganz so. :) Der Cache Mode writeback (unsafe) garantiert keine flushes mehr. Das könnte helfen, ist aber auch nur ein Notnagel. Ansonsten wäre noch Caching in der VM zu betreiben. Aber am Ende muss darauf aufgepasst werden, dass nicht zu viel Caching die Performance wieder drückt...
  7. Alwin

    VM auf ceph storage

    fio's ioengine rbd spricht direkt mit Ceph, da brauchst kein rbd Image anlegen und mounten. ;) Ein leeres und unbelastetes Cluster hat natürlich eine höhere Performance im Test, als im Betrieb. Und 400 MB/s sind nicht so schlecht mit HDDs. Was aber weit von einer 'small block' Performance weg...
  8. Alwin

    Ceph Octopus - Monitor sometimes inconsistent

    kvm6a seems to complain about the other MONs as well. What did the OSD.22 get stuck on? Maybe the MON still had requests for that OSD in the queue that timed out (> 30 sec).
  9. Alwin

    [SOLVED] Problem mit Backup

    Tritt die Problematik auch auf, wenn das vzdump direkt von Hand ausgeführt wird? Sollten sich im /etc/pve/vzdump.cron finden lassen.
  10. Alwin

    [SOLVED] Ceph & iSCSI HA - How to configure the network?

    I meant the interfaces, a LAG between the switches OFC wouldn't help. When two different switches are involved, then you may better use active-backup. Other modes will need further configuration on the switches.
  11. Alwin

    VM auf ceph storage

    Setz den Cache mal auf writeback, sonst wird kein Schreibcache benutzt. ;) Kleine Blockgrößen vertragen sich immer schlecht mit HDDs. Da Ceph dazu noch ein verteiltes System ist, wird's nicht besser. Was für einen Test hast du gemacht?
  12. Alwin

    [SOLVED] how to change the network configuration of ceph nodes?

    There may be service disruptions as the network configuration needs to be applied on the switch and host side. But depending on your Ceph setup, it may not impact VM/CT.
  13. Alwin

    [SOLVED] Ceph & iSCSI HA - How to configure the network?

    For Ceph you will need to create a bond. Or a switched setup with STP and a path cost.
  14. Alwin

    Move single vm backup to another datastore

    That is currently not possible. But there are ideas on the list to make local sync jobs with filters.
  15. Alwin

    [SOLVED] Problem mit Backup

    There is report on our bugzilla with aborted zstd keeping the lock. But similar as to your test cluster, I couldn't reproduce the issue. https://bugzilla.proxmox.com/show_bug.cgi?id=2723
  16. Alwin

    Ceph Octopus - Monitor sometimes inconsistent

    Can you please be more specific about what operations were stuck? Since slow operations can also happen in Nautilus or lower versions.
  17. Alwin

    Web UI cannot create CEPH monitor when multiple pulbic nets are defined

    not yet available but on the todo list for a v2.
  18. Alwin

    [SOLVED] Problem mit Backup

    Ein pveversion -v zeigt die installierten Pakete. Damit lässt sich leicht ein vergleich anstellen.
  19. Alwin

    [SOLVED] PVE 6.3 + OVS / Linux bridge + MLX312B SR-IOV + LACP

    Well, if use the VMs as routers, then you could employ RSTP, routing/switching costs or probably other protocols like ospf, rip, bgp.
  20. Alwin

    ACPI Error Stops Booting with latest Proxmox Update

    You should be able to keep the specific kernel package with apt-mark hold pve-kernel-<version>. Anyway, you can install the older kernel again, they are kept on the repository.

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